Four Years of Nulling Interferometry: A Summary of Results Since PPIV Liu, W. M. ; Hinz, P. M. ; Hoffmann, W. F. ; Meyer, M. R. ; Mamajek, E. E. ; Mmt Adaptive Optics Group Abstract Publication: Protostars and Planets V Posters Pub Date: 2005 Bibcode: 2005prpl.conf.8564L